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1.1 root 1: /*
2: * Copyright (c) 1982, 1990 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.2 ! root 33: * from: @(#)nhpib.c 7.4 (Berkeley) 5/7/91
! 34: * nhpib.c,v 1.2 1993/05/22 07:56:39 cgd Exp
1.1 root 35: */
36:
37: /*
38: * Internal/98624 HPIB driver
39: */
40: #include "hpib.h"
41: #if NHPIB > 0
42:
43: #include "sys/param.h"
44: #include "sys/systm.h"
45: #include "sys/buf.h"
46:
47: #include "device.h"
48: #include "nhpibreg.h"
49: #include "hpibvar.h"
50: #include "dmavar.h"
51:
52: nhpibtype(hc)
53: register struct hp_ctlr *hc;
54: {
55: register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
56: register struct nhpibdevice *hd = (struct nhpibdevice *)hc->hp_addr;
57:
58: if (hc->hp_addr == internalhpib) {
59: hs->sc_type = HPIBA;
60: hs->sc_ba = HPIBA_BA;
61: hc->hp_ipl = HPIBA_IPL;
62: }
63: else if (hd->hpib_cid == HPIBB) {
64: hs->sc_type = HPIBB;
65: hs->sc_ba = hd->hpib_csa & CSA_BA;
66: hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
67: }
68: else
69: return(0);
70: return(1);
71: }
72:
73: nhpibreset(unit)
74: {
75: register struct hpib_softc *hs = &hpib_softc[unit];
76: register struct nhpibdevice *hd;
77:
78: hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
79: hd->hpib_acr = AUX_SSWRST;
80: hd->hpib_ar = hs->sc_ba;
81: hd->hpib_lim = LIS_ERR;
82: hd->hpib_mim = 0;
83: hd->hpib_acr = AUX_CDAI;
84: hd->hpib_acr = AUX_CSHDW;
85: hd->hpib_acr = AUX_SSTD1;
86: hd->hpib_acr = AUX_SVSTD1;
87: hd->hpib_acr = AUX_CPP;
88: hd->hpib_acr = AUX_CHDFA;
89: hd->hpib_acr = AUX_CHDFE;
90: hd->hpib_acr = AUX_RHDF;
91: hd->hpib_acr = AUX_CSWRST;
92: nhpibifc(hd);
93: hd->hpib_ie = IDS_IE;
94: hd->hpib_data = C_DCL;
95: DELAY(100000);
96: }
97:
98: nhpibifc(hd)
99: register struct nhpibdevice *hd;
100: {
101: hd->hpib_acr = AUX_TCA;
102: hd->hpib_acr = AUX_CSRE;
103: hd->hpib_acr = AUX_SSIC;
104: DELAY(100);
105: hd->hpib_acr = AUX_CSIC;
106: hd->hpib_acr = AUX_SSRE;
107: }
108:
109: nhpibsend(unit, slave, sec, addr, origcnt)
110: register char *addr;
111: {
112: register struct hpib_softc *hs = &hpib_softc[unit];
113: register struct nhpibdevice *hd;
114: register int cnt = origcnt;
115:
116: hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
117: hd->hpib_acr = AUX_TCA;
118: hd->hpib_data = C_UNL;
119: if (nhpibwait(hd, MIS_BO))
120: goto senderror;
121: hd->hpib_data = C_TAG + hs->sc_ba;
122: hd->hpib_acr = AUX_STON;
123: if (nhpibwait(hd, MIS_BO))
124: goto senderror;
125: hd->hpib_data = C_LAG + slave;
126: if (nhpibwait(hd, MIS_BO))
127: goto senderror;
128: if (sec != -1) {
129: hd->hpib_data = C_SCG + sec;
130: if (nhpibwait(hd, MIS_BO))
131: goto senderror;
132: }
133: hd->hpib_acr = AUX_GTS;
134: if (cnt) {
135: while (--cnt > 0) {
136: hd->hpib_data = *addr++;
137: if (nhpibwait(hd, MIS_BO))
138: goto senderror;
139: }
140: hd->hpib_acr = AUX_EOI;
141: hd->hpib_data = *addr;
142: if (nhpibwait(hd, MIS_BO))
143: goto senderror;
144: hd->hpib_acr = AUX_TCA;
145: #if 0
146: /*
147: * May be causing 345 disks to hang due to interference
148: * with PPOLL mechanism.
149: */
150: hd->hpib_data = C_UNL;
151: (void) nhpibwait(hd, MIS_BO);
152: #endif
153: }
154: return(origcnt);
155: senderror:
156: nhpibifc(hd);
157: return(origcnt - cnt - 1);
158: }
159:
160: nhpibrecv(unit, slave, sec, addr, origcnt)
161: register char *addr;
162: {
163: register struct hpib_softc *hs = &hpib_softc[unit];
164: register struct nhpibdevice *hd;
165: register int cnt = origcnt;
166:
167: hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
168: hd->hpib_acr = AUX_TCA;
169: hd->hpib_data = C_UNL;
170: if (nhpibwait(hd, MIS_BO))
171: goto recverror;
172: hd->hpib_data = C_LAG + hs->sc_ba;
173: hd->hpib_acr = AUX_SLON;
174: if (nhpibwait(hd, MIS_BO))
175: goto recverror;
176: hd->hpib_data = C_TAG + slave;
177: if (nhpibwait(hd, MIS_BO))
178: goto recverror;
179: if (sec != -1) {
180: hd->hpib_data = C_SCG + sec;
181: if (nhpibwait(hd, MIS_BO))
182: goto recverror;
183: }
184: hd->hpib_acr = AUX_RHDF;
185: hd->hpib_acr = AUX_GTS;
186: if (cnt) {
187: while (--cnt >= 0) {
188: if (nhpibwait(hd, MIS_BI))
189: goto recvbyteserror;
190: *addr++ = hd->hpib_data;
191: }
192: hd->hpib_acr = AUX_TCA;
193: hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
194: (void) nhpibwait(hd, MIS_BO);
195: }
196: return(origcnt);
197: recverror:
198: nhpibifc(hd);
199: recvbyteserror:
200: return(origcnt - cnt - 1);
201: }
202:
203: nhpibgo(unit, slave, sec, addr, count, rw)
204: register int unit, slave;
205: char *addr;
206: {
207: register struct hpib_softc *hs = &hpib_softc[unit];
208: register struct nhpibdevice *hd;
209:
210: hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
211: hs->sc_flags |= HPIBF_IO;
212: if (rw == B_READ)
213: hs->sc_flags |= HPIBF_READ;
214: #ifdef DEBUG
215: else if (hs->sc_flags & HPIBF_READ) {
216: printf("nhpibgo: HPIBF_READ still set\n");
217: hs->sc_flags &= ~HPIBF_READ;
218: }
219: #endif
220: hs->sc_count = count;
221: hs->sc_addr = addr;
222: if (hs->sc_flags & HPIBF_READ) {
223: hs->sc_curcnt = count;
224: dmago(hs->sc_dq.dq_ctlr, addr, count, DMAGO_BYTE|DMAGO_READ);
225: nhpibrecv(unit, slave, sec, 0, 0);
226: hd->hpib_mim = MIS_END;
227: } else {
228: hd->hpib_mim = 0;
229: if (count < hpibdmathresh) {
230: hs->sc_curcnt = count;
231: nhpibsend(unit, slave, sec, addr, count);
232: nhpibdone(unit);
233: return;
234: }
235: hs->sc_curcnt = --count;
236: dmago(hs->sc_dq.dq_ctlr, addr, count, DMAGO_BYTE);
237: nhpibsend(unit, slave, sec, 0, 0);
238: }
239: hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq.dq_ctlr);
240: }
241:
242: nhpibdone(unit)
243: register int unit;
244: {
245: register struct hpib_softc *hs = &hpib_softc[unit];
246: register struct nhpibdevice *hd;
247: register int cnt;
248:
249: hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
250: cnt = hs->sc_curcnt;
251: hs->sc_addr += cnt;
252: hs->sc_count -= cnt;
253: hs->sc_flags |= HPIBF_DONE;
254: hd->hpib_ie = IDS_IE;
255: if ((hs->sc_flags & HPIBF_READ) == 0) {
256: if (hs->sc_count == 1) {
257: (void) nhpibwait(hd, MIS_BO);
258: hd->hpib_acr = AUX_EOI;
259: hd->hpib_data = *hs->sc_addr;
260: hd->hpib_mim = MIS_BO;
261: }
262: #ifdef DEBUG
263: else if (hs->sc_count)
264: panic("nhpibdone");
265: #endif
266: }
267: }
268:
269: nhpibintr(unit)
270: register int unit;
271: {
272: register struct hpib_softc *hs = &hpib_softc[unit];
273: register struct nhpibdevice *hd;
274: register struct devqueue *dq;
275: register int stat0;
276: int stat1;
277:
278: #ifdef lint
279: if (stat1 = unit) return(1);
280: #endif
281: hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
282: if ((hd->hpib_ids & IDS_IR) == 0)
283: return(0);
284: stat0 = hd->hpib_mis;
285: stat1 = hd->hpib_lis;
286: dq = hs->sc_sq.dq_forw;
287: if (hs->sc_flags & HPIBF_IO) {
288: hd->hpib_mim = 0;
289: if ((hs->sc_flags & HPIBF_DONE) == 0)
290: dmastop(hs->sc_dq.dq_ctlr);
291: hd->hpib_acr = AUX_TCA;
292: hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ);
293: dmafree(&hs->sc_dq);
294: (dq->dq_driver->d_intr)(dq->dq_unit);
295: } else if (hs->sc_flags & HPIBF_PPOLL) {
296: hd->hpib_mim = 0;
297: stat0 = nhpibppoll(unit);
298: if (stat0 & (0x80 >> dq->dq_slave)) {
299: hs->sc_flags &= ~HPIBF_PPOLL;
300: (dq->dq_driver->d_intr)(dq->dq_unit);
301: }
302: #ifdef DEBUG
303: else
304: printf("hpib%d: PPOLL intr bad status %x\n",
305: unit, stat0);
306: #endif
307: }
308: return(1);
309: }
310:
311: nhpibppoll(unit)
312: int unit;
313: {
314: register struct nhpibdevice *hd;
315: register int ppoll;
316:
317: hd = (struct nhpibdevice *)hpib_softc[unit].sc_hc->hp_addr;
318: hd->hpib_acr = AUX_SPP;
319: DELAY(25);
320: ppoll = hd->hpib_cpt;
321: hd->hpib_acr = AUX_CPP;
322: return(ppoll);
323: }
324:
325: nhpibwait(hd, x)
326: register struct nhpibdevice *hd;
327: {
328: register int timo = hpibtimeout;
329:
330: while ((hd->hpib_mis & x) == 0 && --timo)
331: DELAY(1);
332: if (timo == 0)
333: return(-1);
334: return(0);
335: }
336:
337: nhpibppwatch(unit)
338: register int unit;
339: {
340: register struct hpib_softc *hs = &hpib_softc[unit];
341:
342: if ((hs->sc_flags & HPIBF_PPOLL) == 0)
343: return;
344: if (nhpibppoll(unit) & (0x80 >> hs->sc_sq.dq_forw->dq_slave))
345: ((struct nhpibdevice *)hs->sc_hc->hp_addr)->hpib_mim = MIS_BO;
346: else
347: timeout(nhpibppwatch, unit, 1);
348: }
349: #endif
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